Sketch2CAD

Hands sketched images (e.g. Sketch/Draw App exports) → DXF / STEP.

🚧 Project scaffold – implementation in progress.

See roadmap and issues for details.

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Sketch2CAD converts hand sketches (e.g. Samsung Flip exports/photos) into CAD-friendly DXF, and later optionally STEP (3D).

MVP pipeline (Phase 1)

OpenCV (clean) → Potrace (vectorize) → ezdxf (DXF export)

Scaling (MVP)

Scaling is done via reference in the image:

• recommended: draw a reference line (e.g. 100mm) and provide --ref-mm + --ref-px (quick mode)
• later (Phase 2/3): auto screen detection using display dimensions, with reference fallback

Install

System dependency (Ubuntu/Debian):

sudo apt update && sudo apt install -y potrace

Python:

python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev,svg]"

Usage

Single run (MVP quick scaling):

sketch2cad run examples/input/input.png --output examples/output/out.dxf --ref-mm 100 --ref-px 842

Hotfolder:

sketch2cad watch ./examples/input ./examples/output

Smoke: CLI help

sketch2cad --help
sketch2cad run --help
sketch2cad watch --help